There are 11 identified genes that influence coat color in dogs. Dog inherits one gene from each parent and only the dominant gene gets expressed.

Case- A dog may be genetically black or brown, if one parent is homozygous black BB and the other is homozygous brown bb. The offspring produced will be heterozygous Bb and will be black in color. So, black will be the dominant coat color.

If these heterozygous offspring Bb are crossed amongst themselves, homozygous black BB, heterozygous black Bb, and homozygous brown bb offspring will be produced in the ratio 1:2:1

The dominant coat color in this case will be black.